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Race Crank Case ADDY 50-1A Push-start PUCH MAXI E50

SKU: MD0120
€ 399,50 (including VAT)

Race Crank Case ADDY 50-1A Push-start PUCH MAXI E50

  • Race crank case.
  • ADDY 50-1A Model.
  • Push/Pedal start version.
  • The first crank case with many advantages for racing have been implemented
  • Also suitable for street use.
  • Extra wide and flat surface with pre-positioning for reedvalve conversions WITHOUT welding. Warped, crooked and bad engine cases are now a thing of the past. 


  • Significantly more sealing surface at the cylinder mount than E50 and E50-A. 
  • 4 bearing pedal start engine.
  • Prepared for a case reed valve (with at least 2mm thick inlet gasket original carburettor can be mounted on original cylinder.
  • Positioning pins for the housing halves 
  • More threaded holes for ignition mounting (for more flexible ignition mounting) 
  • Cooling fins for controlled temperatures. 
  • Optimised fluid chamber.
  • No center stand mount (racing case) but instead you can mount a side stand.
  • Cylinder stud hole pattern 44mm x 44mm.
  • Diameter of cylinder neck is 48.4mm and can be spindled up to 53mm if no GME is used.
  • Basically a little more massive everywhere.

Assembly instructions: 

The housing must be taken apart at the beginning. It has many attachment points for screwdrivers to split the housing. CAUTION!!! Caution is advised. The positioning pins are very precise, so the casing must be loosened very parallel from each other. The housing can be very tight when new. Targeted use of a screwdriver and rubber mallet can achieve the desired result here. 

After dismantling, the housing must be cleaned of any metal chips and oils. Then the positioning of the secondary shaft can be adjusted using the spacers supplied. (17/24mm washer between bearing and gear wheel for better bearing fit. 28/40mm washers between bearing and tight fit in the engine, right and left, as required. A minimum clearance of 0.15mm should be left). 

Finally, as with the original housings, sealant should be applied to the sealing surfaces on the cases. The mounting bolds that are needed: 7 pieces M6x35 and 6 pieces M6x50. The housing should ideally be screwed on with screws of strength 10.9 and 12-15Nm torque. Tighten the screws from the inside to the outside and always crosswise.

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